lungs
legs and arms
stomach
torso and head
it slows down
it swells with fluid before shrinking
nothing, it stays the same
it speeds up
brains
hands
muscles
legs
regular gravity
zero gravity
microgravity
their sense of balance gets worse
their sense of balance doesn’t change
their sense of balance gets better
eating
talking
walking
interacting
motion sickness
sleeping sickness
food poisoning
migraines